Licenses are not entirely garbage. They grant you a license to use something. Apple is a turd for saying that they can revoke the license without reason at any time. Licenses can be less ridiculous than what Apple offers, but at the same time, creators are not going to offer you ownership of content for 5 dollars. Even if you had the media, a license could be revoked to the extent that an enforceable contract between you want the licensor says so. I think the question here is whether Apple's contract, which offers nothing definitive to the licensee, is valid.